Wasā’il al-Shīʿa, Age and signs of puberty and the attachment of responsibility with it – Ḥadīth #12

12 – Muhammad b. al-Hasan with his isnad from Muhammad b. `Ali b. Mahbub from Muhammad b. al-Husayn from Ahmad b. al-Hasan b. `Ali from `Amr b. Sa`id from Musaddiq b. Sadaqa from `Ammar as-Sabati from Abu `Abdillah عليه السلام.
He said: I asked him about the boy, when is salat obligatory for him? So he said: When he comes to thirteen years. As to when he has a nocturnal emission prior to that, then salat becomes obligatory for him, and the pen flows upon him. And the girl is like that when she comes to thirteen years, or she menstruates prior to that, then salat has become obligatory for her, and the pen flows upon her.